Manufacturing device and method for bimetal composite hollow billet

Abstract

A manufacturing device for a bimetal composite hollow billet, includes a mandrel, a frame, a planetary carrier rotatably disposed on the frame, a plurality of rolls rotatably disposed on the planetary carrier, and disposed around the mandrel, and a bimetallic pipe to be processed is sleeved on the mandrel.

What is claimed is: 
     
         1 . A manufacturing device for a bimetal composite hollow billet, comprising:
 a mandrel;   a frame;   a planetary carrier rotatably disposed on the frame;   a plurality of rolls rotatably disposed on the planetary carrier, and disposed around the mandrel; and   a bimetallic pipe to be processed is sleeved on the mandrel.   
     
     
         2 . The manufacturing device of  claim 1 , wherein a roll of the plurality of rolls comprises a thread section, a flattening section, and a rounding section that are sequentially disposed. 
     
     
         3 . The manufacturing device of  claim 2 , wherein the roll and the mandrel have a first non-zero angle therebetween. 
     
     
         4 . The manufacturing device of  claim 2 , wherein the thread section comprises a tapered thread disposed on an outer wall of the roll. 
     
     
         5 . The manufacturing device of  claim 4 , wherein a larger end of the tapered thread faces the flattening section. 
     
     
         6 . The manufacturing device of  claim 4 , wherein the mandrel is provided with a guide section protruding outward, the guide section is parallel to the thread section, and the guide section is located directly below the thread section. 
     
     
         7 . The manufacturing device of  claim 1 , wherein a rotation direction of the planetary carrier is opposite to a rotation direction of the plurality of rolls. 
     
     
         8 . The manufacturing device of  claim 1 , wherein the bimetallic pipe is a preformed bimetallic sleeve pipe blank. 
     
     
         9 . The manufacturing device of  claim 8 , wherein the preformed bimetallic sleeve pipe blank is formed by heating the preformed bimetallic sleeve pipe blank above a recrystallization temperature, sleeving the heated preformed bimetallic sleeve pipe blank on the mandrel, and starting the planetary carrier and the plurality of rolls for rolling. 
     
     
         10 . The manufacturing device of  claim 9 , wherein the preformed bimetallic sleeve pipe blank comprises:
 an external layer composite pipe and an internal layer base pipe disposed coaxially; and   a wall thickness of the external layer composite pipe is 26%-28.4% of a wall thickness of the internal layer base pipe.   
     
     
         11 . A manufacturing method for a bimetal composite hollow billet, comprising:
 heating a preformed bimetallic sleeve pipe blank above a recrystallization temperature;   sleeving the heated preformed bimetallic sleeve pipe blank on a mandrel; and   starting a planetary carrier and a plurality of rolls for rolling.   
     
     
         12 . The manufacturing method of  claim 11 , wherein the preformed bimetallic sleeve pipe blank comprises an external layer composite pipe and an internal layer base pipe disposed coaxially; and a wall thickness of the external layer composite pipe is 26%-28.4% of a wall thickness of the internal layer base pipe. 
     
     
         13 . The manufacturing method of  claim 11 , wherein the preformed bimetallic sleeve pipe blank is formed by a manufacturing device, comprising:
 the mandrel;   a frame;   a planetary carrier rotatably disposed on the frame;   the plurality of rolls rotatably disposed on the planetary carrier, and disposed around the mandrel; and   the preformed bimetallic sleeve pipe blank to be processed being sleeved on the mandrel.   
     
     
         14 . The manufacturing method of  claim 13 , wherein a roll of the plurality of rolls comprises a thread section, a flattening section, and a rounding section that are sequentially disposed. 
     
     
         15 . The manufacturing method of  claim 14 , wherein the roll and the mandrel have a first non-zero angle therebetween. 
     
     
         16 . The manufacturing method of  claim 14 , wherein the thread section comprises a tapered thread disposed on an outer wall of the roll. 
     
     
         17 . The manufacturing method of  claim 16 , wherein a larger end of the tapered thread faces the flattening section. 
     
     
         18 . The manufacturing method of  claim 16 , wherein the mandrel is provided with a guide section protruding outward, the guide section is parallel to the thread section, and the guide section is located directly below the thread section. 
     
     
         19 . The manufacturing method of  claim 13 , wherein a rotation direction of the planetary carrier is opposite to a rotation direction of the plurality of rolls.